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使用 hdparm 测试硬盘速度：

hdparm 是linux 测试硬盘及改变硬盘设定的指令

#hdparm -t /dev/hda < - - - 测试硬盘/dev/hda 的速度

如果是scsi 的话/dev/sda , /dev/sdb

#hdparm -c 1 /dev/hda < - - - 开启ide 硬盘的32bit

#hdparm -d 1 /dev/hda < - - - 开启dma mode

这样再次的测试你的硬盘就可以发现你的硬盘便快了

以下是我对三台安装 Debian 操作系统的计算机所做的测试结果：

1×250Gb STAT PC

# hdparm -t /dev/sda2

/dev/sda2:
Timing buffered disk reads: 264 MB in 3.01 seconds = 87.60 MB/sec

2×140Gb SCSI RAID1

# hdparm -t /dev/md0

/dev/md0:
Timing buffered disk reads: 226 MB in 3.02 seconds = 74.83 MB/sec

# hdparm -t /dev/md2

/dev/md2:
Timing buffered disk reads: 208 MB in 3.02 seconds = 68.97 MB/sec

# hdparm -t /dev/sda1

/dev/sda1:
Timing buffered disk reads: 226 MB in 3.01 seconds = 75.00 MB/sec
# hdparm -t /dev/sdb1

/dev/sdb1:
Timing buffered disk reads: 344 MB in 3.03 seconds = 113.71 MB/sec
# hdparm -t /dev/sdb2

/dev/sdb2:
Timing buffered disk reads: 318 MB in 3.02 seconds = 105.32 MB/sec

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